All jokes aside I think its simply his age that's catching him up. I got free tickets to see his one man show about 15 years ago and I thought he was pretty good. He played piano, sang, tap danced, told jokes and his ability to ad lib and interact with the audience was pretty good.
Let's not...
Bruce rocks! He was at the Iron Maiden gig at the O2 back in August. His grandson was in the support band Voodoo Six. It was cool seeing him in a Maiden t shirt giving it the horns from the mosh pit (: